Jim and Sally are playing catch but neither of them is very good at catching the ball. When Jim

throws to Sally, 1/3 of the time she gets the ball, 1/6 of the time Jim retrieves it, 1/6 of the time the

dog runs off with it, and 1/3 of the time it rolls down the storm sewer. When Sally throws to Jim, 1/3

of the time he gets it, 1/3 of the time Sally retrieves it, 1/6 of the time the dog runs off with it, and

1/6 of the time it rolls down the storm sewer. If Sally has the ball now, what is the probability the

ball ends up in the storm sewer